Ok ok I admit.....
My wife and I have both been in the big blue without a signalling device. Neither a whistle or a sausage. It is a situation we both will rectify soon. (Before we hit the big water again) Due to the properties of sound on the water I would believe the sausage is much more effective than a whistle. The whistle blast gets people looking but determining direction is very difficult. I am also getting (or making) bangers for both of us. She likes to swim a little above and behind me. So if I have to look for her I have to do all sorts of contortions to get turned around. When I was O/W trained 9 years ago I don't remember surface signalling devices discussed. Under water we were told to bang a knife handle on the side of the tank.
Tom
My wife and I have both been in the big blue without a signalling device. Neither a whistle or a sausage. It is a situation we both will rectify soon. (Before we hit the big water again) Due to the properties of sound on the water I would believe the sausage is much more effective than a whistle. The whistle blast gets people looking but determining direction is very difficult. I am also getting (or making) bangers for both of us. She likes to swim a little above and behind me. So if I have to look for her I have to do all sorts of contortions to get turned around. When I was O/W trained 9 years ago I don't remember surface signalling devices discussed. Under water we were told to bang a knife handle on the side of the tank.
Tom